Gaseous fuel mixing device



Sept. 29, 1931. H. RABEZZANA 1,325,361

GASEOUS FUEL MIXING DEVICE FiledAbril 22. 1927 Patented Sept. 29, 1931 UNITED. srArEs PATENT GFFICE HECTOR RABEZZANA, FLINT, MICHIGAN, ASSIGNOR TO A C SPARK PLUG COlVI- PANY, OF FLINT, MICHIGAN, A COMPANY OF MICHIGAN ensnous FUEL MI ING pEv cE- v 7 Application filed April 22, 19271 Serial No. 185,751.

This invention relates to new and useful improvements in internal combustlon en- 'gines, and more particularly to means for improving the carburetion of fuel in such engines at all times and particularly when starting, or in running at low speeds, or during cold weather. I v

In one desirable embodiment of the invention, a prime mover such as an electric motor driven from the battery, actuates a fuel mixer or stirrer which mixes and stirs the carburetted air from the carburetor before it is drawn into the usual intake manifold. At high speeds, the suction of the motor functions to run the rotor and the battery is therefore only used during the operation of the car in starting and at low speeds. At higher speeds the rotor merely idles and adds nothing to the engine efficiency but does not interfere therewith.

The invention aims to give a greater homogeneity to the fuel mixture before 1t reaches the various cylinders; that is, the air and gasoline are more thoroughly commlngled by a positive action of the rotor. To attain this end I make use of special mixing blades or stirring fans on the electrically driven agitator or rotor in the mixing casing. These blades or fans are so constructed that they act solely to stir or mix the fuel and in no sense act as supercharging blades. The structures of the present invention is in no wise a supercharger but solely a mechanical mixer or stirrer which gives greater umformity to the fuel. This results in a greater engine efficiency, lowers the gasoline consumption, will give more power, reduce the carbon deposit and knocking, and prevent quick sooting of the plugs.

It is accordingly the chief obj ect of my 1nvention to provide a. simple contrivance which will mix and stir and thoroughly agitate the fuel mixture to such a degree that a more complete homogeneity is obtained be fore the mixture is admitted to the cylinders.

Another object of the invention is to provide a fuel agitation device to increase the power of the engine at low speed so that a quicker and easier pick-up is possible.

In the accompanying drawings:

Fig.1 is an elevational view of an internal combust on engln-e lllustrating the appllcat on of my mvention' thereto.

, Fig. 2 is a front view of the same, showing a the various parts comprising the invention. Fig. "'3 is aside View of the mixing or stirring blade unit.

F ig; f is a section through Fig. 3.

Figs. 5 and 6 are modifications of the struc- M ture of Fig. 4.

Referring to the numbered parts on the drawings, 10 indicates an internal combustion engine of any suitable type, 11 the intake manifold thereof. 12 the carburetor and 13 the gasoline lead pipe.

Between the engine 10 and the carburetor 12 applied a casing 14 in which there is inclosed an agitator or rotor 15 mounted on shaft and driven by an electric motor inclosed within the casing 16. The air intake to the carburetor is shown at 17' and after passing through the carburetor the fuel is conducted to the casing 14 where'itis agitated or stirred by the agitator or rotor 15 before entering the firing chamber.

The agitator15 has a special form of blade 1 8 shown in detail in Fig. 4. The blades are provided with recesses 19 immediately adja-' cent to hub 20 while the outer portion of the blades has a plurality of openings 21, the purpose of the recesses and the openings being to allow for a passage of fuel therethru andto prevent compression of the fuel and to avoid supercharging by forcing the fuel 1 into the firing chamber. Arib 22 is provided on each blade for strengtheningpurposes.

In Fig. 5 I have shown one-half ofa modified form of a blade 18'. the recesses 19 similar to the recesses 19 of the blade 18 while its outer portion is formed The blade has F tied form of the blade. The sides are formed with a plurality of transverse recesses 19, the width of the successive recesses decreas ing toward the tip of the blade, although the recesses may be of the same width.

Each rotor is provided with a central open- Too ing 24 for the reception of a shaft driven by the electric motor Within the housing 16.

The construction of the blades of the rotor or agitator 15 is such that substantially no compression Will take place Within the casing 14;, the blades merely acting as stirring or mixing elements for the fuel in order that the air and gasoline may attain a greater homogeneity.

T he agitator does not act as a supercharger and While perhaps at starting there is a certain amount of forcing of the fuel due to the rot. ion of the agitator; this is merely an incidental operation as the function of the rotor is intended solely as a mixer or stirrer so that the air and fuel Will be better commingled.

The device is intended primarily for starting and at low speeds. Prior to the starting of the engine the electric motor Within the casing 16 is set in operation which Will rotate the agitator 15 and get better mixture for the cylinders. At higher speeds the suction of the engine through the intake mam fold will be more than ample to rotate the agitator and at which time the motor may be disconnected. At high speeds the rotor is substantially inoperative and is merely idly driven by the force of suction in the intake manifold.

I claim:

1. In a gaseous fuel mixing device for engines having an intake manifold comprising a casing independent of the manifold, a rotor in said casing, said rotor having a plurality of mixing blades power operated means for driving said rotor, said blades having a configuration substantially to prevent compression of the fuel.

2. In a gaseous fuel mixing device for engines having an intake manifold, comprising a casing independent of the manifold, a rotor in said casing, said rotor having a plurality of mixing blades, and said blades having recesses substantially to prevent compression of the fuel.

3. In a gaseous fuel mixing device for engines comprising a casing, a rotor in said casing said rotor having a plurality of mixing blades and said blades having a plurality of openings and recesses substantially to prevent compression of the fuel.

In a gaseous fuel mixing device for engines comprising a casing, a rotor in said casing, said rotor having a plurality of mi);- ing blades conforming in contour to the interior of the casing, said blades having a plurality of openings and recesses substantially to prevent compression of the fuel.

In testimony whereof I aifix my si nature. 7

rmo'ron RABEZZZNA. 

